52171556221705 has 8 divisors (see below), whose sum is σ = 66288565552392. Its totient is φ = 39282112919808.

The previous prime is 52171556221663. The next prime is 52171556221709. The reversal of 52171556221705 is 50712265517125.

52171556221705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8520111479929 + 43651444741776 = 2918923^2 + 6606924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52171556221705 - 2⁹ = 52171556221193 is a prime.

It is a super-2 number, since 2×52171556221705² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52171556221709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306891507102 + ... + 306891507271.

It is an arithmetic number, because the mean of its divisors is an integer number (8286070694049).

Almost surely, 2^{52171556221705} is an apocalyptic number.

It is an amenable number.

52171556221705 is a deficient number, since it is larger than the sum of its proper divisors (14117009330687).

52171556221705 is a wasteful number, since it uses less digits than its factorization.

52171556221705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613783014395.

The product of its (nonzero) digits is 1470000, while the sum is 49.

The spelling of 52171556221705 in words is "fifty-two trillion, one hundred seventy-one billion, five hundred fifty-six million, two hundred twenty-one thousand, seven hundred five".